chore(ci): 添加 Gradle 执行权限

- 在构建工作流中添加了 chmod +x gradlew 命令
- 确保 gradlew 脚本具有执行权限
-修复了因权限不足导致的构建失败问题

Author: HuoHuas001

.github/workflows/build.yml

@@ -34,6 +34,9 @@ jobs:
     - name: Setup Gradle
       uses: gradle/actions/setup-gradle@v3
 
+    - name: Grant execute permission
+      run: chmod +x gradlew
+
     - name: Build with Gradle
       run: ./gradlew build